CN111777367B - Waterproof repair mortar for building wall and preparation method thereof - Google Patents
Waterproof repair mortar for building wall and preparation method thereof Download PDFInfo
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- CN111777367B CN111777367B CN202010682342.1A CN202010682342A CN111777367B CN 111777367 B CN111777367 B CN 111777367B CN 202010682342 A CN202010682342 A CN 202010682342A CN 111777367 B CN111777367 B CN 111777367B
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- repair mortar
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- silicon dioxide
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention relates to waterproof repair mortar for building walls and a preparation method thereof, wherein the waterproof repair mortar comprises the following components in parts by weight: 2-10 parts of silicon dioxide coated microcapsule hydrophobic material, 35-55 parts of cement, 35-50 parts of quartz sand, 5-8 parts of latex powder, 1-3 parts of water retention thickening material and 0.5-5 parts of water reducing agent; the core layer of the microcapsule hydrophobic material coated by the silicon dioxide is an organic silicon hydrophobic agent and a dispersing agent, the mass ratio of the organic silicon hydrophobic agent to the dispersing agent is 1:2-3.5, the shell layer is a silicon dioxide-based polymer-based network polymer, and the mass ratio of the core layer to the shell layer is 1: 2-5. The invention also discloses a preparation method of the repair mortar. The repair mortar prepared by the formula and the preparation method has the advantages of good waterproofness, excellent permeation resistance, high tensile bonding strength, good water retention performance and no bleeding phenomenon.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to waterproof repair mortar for building wall surfaces and a preparation method thereof.
Background
In recent years, the problems of concrete peeling, cracking, damage and steel bar corrosion on the surface of a building are increasingly emphasized, the appearance of the building is affected, and even the normal use and the safe service of the building are endangered, so that repair and repair are urgently needed. Therefore, the material suitable for repairing and repairing the building is selected, and the method has important significance for protecting the building, prolonging the service life of the building and reducing the maintenance cost. Aiming at different damage problems of buildings, corresponding repairing materials are adopted, and certain performance requirements are different according to different use occasions and different engineering positions. Although there are many repair mortars at present, along with the complication of repair parts and diversification of structures, a waterproof type repair material is needed to compensate.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide waterproof repair mortar for building wall surfaces and a preparation method thereof.
The invention is realized by the following technical scheme:
the waterproof repair mortar for the building wall is characterized by comprising the following components in parts by weight:
2-10 parts of microcapsule hydrophobic material, 35-55 parts of cement, 35-50 parts of quartz sand, 5-8 parts of latex powder, 1-3 parts of water-retaining thickening material and 0.5-5 parts of water reducing agent,
the microcapsule hydrophobic material is a microcapsule hydrophobic material coated by silicon dioxide, the core layer of the microcapsule hydrophobic material is an organic silicon hydrophobic agent and a dispersing agent, and the mass ratio of the organic silicon hydrophobic agent to the dispersing agent is 1:2-3.5, wherein the shell layer is a silicon dioxide-based polymer-based network polymer, and the mass ratio of the core layer to the shell layer is 1: 2-5.
As an improvement, the latex powder is chemical rubber powder; the water-retaining thickening material is one of hydroxypropyl methyl cellulose and hydroxyethyl methyl cellulose, and the viscosity is 75000-200000 m.Pa; the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent.
The preparation method of the waterproof repair mortar for the building wall is characterized by comprising the following steps:
(1) uniformly mixing epoxy resin and tetraethyl orthosilicate, mixing the mixture with an aqueous solution of a polyether nonionic surfactant, stirring the mixture at a high speed for 15min, heating the mixture in a water bath, adding a dilute hydrochloric acid solution into the solution, continuously stirring the mixture for 15h, repeatedly washing and drying the mixture after the reaction is finished to obtain a silicon dioxide-based polymer-based network polymer;
(2) uniformly stirring and mixing the organic silicon water repellent and the dispersing agent in the formula amount in water, then adding the silicon dioxide-based polymer-based network polymer while stirring, continuously stirring for 2-3h, filtering and drying to obtain a silicon dioxide-coated microcapsule hydrophobic material;
(3) taking the silicon dioxide coated microcapsule hydrophobic material, cement, quartz sand, latex powder, a water retention thickening material and a water reducing agent according to the formula ratio, stirring and mixing uniformly to prepare dry powder-shaped repair mortar, and adding water for use.
As an improvement, in the step (1), the mass ratio of the epoxy resin to the tetraethyl orthosilicate is 2: 1; the concentration of the aqueous solution of the polyether nonionic surfactant is 2 percent; the concentration of the dilute hydrochloric acid is 2 mol/L; the water bath heating temperature is 40-50 ℃; in the step (2), the dispersant is sodium dodecyl benzene sulfonate.
According to the invention, the microcapsule hydrophobic material coated by silicon dioxide is prepared by treating the microcapsule hydrophobic material, so that the waterproof performance of the repair mortar is improved, the bonding performance of the repair mortar is improved through a mechanism of the combined action of latex powder and cement, and the volume stability is good; the waterproof mortar prepared by the formula and the process has good waterproofness, permeation resistance, tensile bonding strength, water retention and the like.
Detailed Description
The present invention will be described in detail with reference to specific examples, which are provided herein for the purpose of illustration only and are not intended to limit the scope of the present invention.
Example 1
The waterproof repair mortar for the building wall comprises the following components in parts by weight: 7 parts of microcapsule hydrophobic material, 35 parts of cement, 42 parts of quartz sand, 8 parts of acrylic rubber powder, 3 parts of hydroxypropyl methyl cellulose with the viscosity of 75000.Pa and 5 parts of polycarboxylic acid high-efficiency water reducing agent.
The microcapsule hydrophobic material is a microcapsule hydrophobic material coated by silicon dioxide, the core layer is an organic silicon hydrophobic agent and a dispersing agent, and the mass ratio of the two is 1:2, the shell layer is a silicon dioxide-based polymer-based network polymer, and the mass ratio of the core layer to the shell layer is 1: 2.
a preparation method of waterproof repair mortar for building walls comprises the following steps: (1) uniformly mixing epoxy resin and tetraethyl orthosilicate according to the mass ratio of 2:1, mixing the mixture with an aqueous solution of a polyether nonionic surfactant with the concentration of 2%, stirring the mixture at a high speed for 15min, heating the mixture in a water bath at 50 ℃, adding a dilute hydrochloric acid solution with the concentration of 2mol/L into the solution, continuously stirring the mixture for 15h, repeatedly washing and drying the mixture after the reaction is finished, and obtaining a silicon dioxide-based polymer-based network polymer; (2) stirring and mixing an organic silicon water repellent and a dispersant sodium dodecyl benzene sulfonate uniformly in water, then adding a polymer-based network polymer of a silicon dioxide unit while stirring, continuously stirring for 3 hours, filtering and drying to prepare a silicon dioxide-coated microcapsule hydrophobic material; (3) and uniformly stirring and mixing the prepared silicon dioxide coated microcapsule hydrophobic material, cement, quartz sand, latex powder, a water-retaining thickening material and a water reducing agent to prepare dry powder repair mortar, and adding water for use.
Example 2
The waterproof repair mortar for the building wall comprises the following components in parts by weight: 5 parts of microcapsule hydrophobic material, 44 parts of cement, 44 parts of quartz sand, 5 parts of ethylene-vinyl acetate copolymer, 1 part of hydroxyethyl methyl cellulose with the viscosity of 100000m.Pa and 1 part of polycarboxylic acid high-efficiency water reducing agent.
The microcapsule hydrophobic material is a silica-coated microcapsule hydrophobic material, the core layer of the microcapsule hydrophobic material is an organic silicon hydrophobic agent and a dispersing agent, and the mass ratio of the organic silicon hydrophobic agent to the dispersing agent is 1:2, the shell layer is a silicon dioxide-based polymer-based network polymer, and the mass ratio of the core layer to the shell layer is 1: 2.
the concrete preparation method of the repair mortar of this example is the same as that of example 1.
Example 3
The waterproof repair mortar for the building wall comprises the following components in parts by weight: .5 parts of microcapsule hydrophobic material, 35 parts of cement, 45 parts of quartz sand, 7 parts of ethylene-vinyl acetate copolymer, 3 parts of hydroxypropyl methyl cellulose with the viscosity of 75000m.Pa and 5 parts of polycarboxylic acid high-efficiency water reducing agent.
The microcapsule hydrophobic material is a silica-coated microcapsule hydrophobic material, the core layer of the microcapsule hydrophobic material is an organic silicon hydrophobic agent and a dispersing agent, and the mass ratio of the organic silicon hydrophobic agent to the dispersing agent is 1:2, the shell layer is a silicon dioxide-based polymer-based network polymer, and the mass ratio of the core layer to the shell layer is 1: 2.
the concrete preparation method of the repair mortar of this example is the same as that of example 1.
Example 4
The waterproof repair mortar for the building wall comprises the following components in parts by weight: 5 parts of microcapsule hydrophobic material, 40 parts of cement, 45 parts of quartz sand, 8 parts of ethylene-vinyl acetate copolymer, 1.5 parts of hydroxypropyl methyl cellulose with the viscosity of 150000.Pa and 0.5 part of polycarboxylic acid high-efficiency water reducing agent.
The microcapsule hydrophobic material is a silica-coated microcapsule hydrophobic material, the core layer of the microcapsule hydrophobic material is an organic silicon hydrophobic agent and a dispersing agent, and the mass ratio of the organic silicon hydrophobic agent to the dispersing agent is 1:2, the shell layer is a silicon dioxide-based polymer-based network polymer, and the mass ratio of the core layer to the shell layer is 1: 2.
the concrete preparation method of the repair mortar of this example is the same as that of example 1.
Example 5
The waterproof repair mortar for the building wall comprises the following components in parts by weight: 3 parts of microcapsule hydrophobic material, 43 parts of cement, 43 parts of quartz sand, 5 parts of acrylic rubber powder, 2 parts of hydroxypropyl methyl cellulose with the viscosity of 75000.Pa and 4 parts of polycarboxylic acid high-efficiency water reducing agent.
The microcapsule hydrophobic material is a silica-coated microcapsule hydrophobic material, the core layer of the microcapsule hydrophobic material is an organic silicon hydrophobic agent and a dispersing agent, and the mass ratio of the organic silicon hydrophobic agent to the dispersing agent is 1:2, the shell layer is a silicon dioxide-based polymer-based network polymer, and the mass ratio of the core layer to the shell layer is 1: 2.
the concrete preparation method of the repair mortar of this example is the same as that of example 1.
Comparative example 1
The repair mortar was not supplemented with a silica-coated microencapsulated hydrophobic material, and the remaining conditions were the same as in example 5.
The test results of the examples and the comparative examples are shown in Table 1 under the same test conditions.
TABLE 1
| Tensile bond original strength/MPa | impermeability/MPa | 7d compressive strength/MPa | 28d compressive strength/MPa | Bleeding rate,% of | Water retention property% | |
| Example 1 | 2.6 | 1.6 | 45.3 | 65.7 | Is free of | 99 |
| Example 2 | 3.0 | 1.7 | 38.5 | 60.2 | Is free of | 98 |
| Example 3 | 2.9 | 1.6 | 46.7 | 64.1 | Is free of | 99 |
| Example 4 | 2.9 | 1.6 | 37.8 | 65.2 | Is free of | 99 |
| Example 5 | 2.8 | 1.8 | 41.8 | 63.4 | Is free of | 96 |
| Comparative example 1 | 2.0 | 0.8 | 39.7 | 59.6 | Is free of | 95 |
As can be seen from the test results in Table 1, the repair mortar prepared by the invention has the advantages of no bleeding, good water retention, high strength, excellent anti-permeability performance, good bonding performance with a base layer and the like.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. Any person skilled in the art should be able to substitute or change the technical solution of the present invention and its inventive concept within the technical scope of the present invention.
Claims (9)
1. The waterproof repair mortar for the building wall is characterized by comprising the following components in parts by weight:
2-10 parts of microcapsule hydrophobic material, 35-55 parts of cement, 35-50 parts of quartz sand, 5-8 parts of latex powder, 1-3 parts of water-retaining thickening material and 0.5-5 parts of water reducing agent,
the microcapsule hydrophobic material is a microcapsule hydrophobic material coated by silicon dioxide, the core layer of the microcapsule hydrophobic material is an organic silicon hydrophobic agent and a dispersing agent, and the mass ratio of the organic silicon hydrophobic agent to the dispersing agent is 1:2-3.5, wherein the shell layer is a silicon dioxide-based polymer-based network polymer, and the mass ratio of the core layer to the shell layer is 1: 2-5;
the preparation method of the waterproof repair mortar for the building wall surface specifically comprises the following steps:
(1) uniformly mixing epoxy resin and tetraethyl orthosilicate, mixing the mixture with an aqueous solution of a polyether nonionic surfactant, stirring the mixture at a high speed for 15min, heating the mixture in a water bath, adding a dilute hydrochloric acid solution into the solution, continuously stirring the mixture for 15h, repeatedly washing and drying the mixture after the reaction is finished to obtain a silicon dioxide-based polymer-based network polymer;
(2) uniformly stirring and mixing the organic silicon water repellent and the dispersing agent in the formula amount in water, then adding the silicon dioxide-based polymer-based network polymer while stirring, continuously stirring for 2-3h, filtering and drying to obtain a silicon dioxide-coated microcapsule hydrophobic material;
(3) taking the silicon dioxide coated microcapsule hydrophobic material, cement, quartz sand, latex powder, a water retention thickening material and a water reducing agent according to the formula ratio, stirring and mixing uniformly to prepare dry powder-shaped repair mortar, and adding water for use.
2. The waterproof repair mortar for building walls according to claim 1, wherein the latex powder is chemical rubber powder.
3. The waterproof repair mortar for building walls as claimed in claim 1, wherein the water-retaining thickening material is one of hydroxypropyl methylcellulose and hydroxyethyl methylcellulose, and the viscosity is 75000-.
4. The waterproof repair mortar for building walls according to claim 1, wherein the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent.
5. The waterproof repair mortar for building walls according to claim 1, wherein in the step (1), the mass ratio of the epoxy resin to the tetraethyl orthosilicate is 2: 1.
6. The waterproof repair mortar for building walls according to claim 1, wherein in the step (1), the concentration of the aqueous solution of the polyether nonionic surfactant is 2%.
7. The waterproof repair mortar for building walls according to claim 1, wherein in the step (1), the concentration of the dilute hydrochloric acid is 2 mol/L.
8. The waterproof repair mortar for building walls according to claim 1, wherein in the step (1), the water bath heating temperature is 40 to 50 ℃.
9. The waterproof repair mortar for building walls according to claim 1, wherein in the step (2), the dispersant is sodium dodecylbenzenesulfonate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010682342.1A CN111777367B (en) | 2020-07-15 | 2020-07-15 | Waterproof repair mortar for building wall and preparation method thereof |
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| CN202010682342.1A CN111777367B (en) | 2020-07-15 | 2020-07-15 | Waterproof repair mortar for building wall and preparation method thereof |
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| CN112479668A (en) * | 2020-12-09 | 2021-03-12 | 上海唐臻园林建筑工程有限公司 | Special cement for building clean water brick wall and construction method thereof |
| CN115974501A (en) * | 2022-12-26 | 2023-04-18 | 厦门天润锦龙建材有限公司 | Dry-mixed waterproof mortar and preparation method thereof |
| CN115974502A (en) * | 2022-12-26 | 2023-04-18 | 厦门天润锦龙建材有限公司 | Waterproof and impervious repair mortar and preparation method thereof |
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| CN101935201B (en) * | 2009-06-30 | 2012-09-05 | 中冶建筑研究总院有限公司 | Single-component high-performance mortar for repairing and reinforcing concrete |
| JP5792056B2 (en) * | 2011-12-28 | 2015-10-07 | 太平洋マテリアル株式会社 | Mortar |
| CN104829170B (en) * | 2015-01-05 | 2017-05-10 | 潍坊德霖建材科技有限公司 | Preparation method of high-performance anti-corrosion repairing mortar |
| CN106215825B (en) * | 2016-07-25 | 2019-03-22 | 燕山大学 | A kind of preparation method of titanium dioxide silicon substrate microcapsules |
| CN106380112B (en) * | 2016-08-30 | 2019-01-04 | 长安大学 | Hydrophobic microcapsules are in the application for improving agent on crack resistance of concrete permeability |
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Effective date of registration: 20220714 Address after: 317000 wukong'ao village, Dayang office, Linhai City, Taizhou City, Zhejiang Province Patentee after: Linhai Zhongxin new building materials Co.,Ltd. Address before: 317000 wukong'ao village, Dayang office, Linhai City, Taizhou City, Zhejiang Province Patentee before: ZHEJIANG ZHONGXIN NEW BUILDING MATERIALS Co.,Ltd. |